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Mergers and Acquisitions - Summary of Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands | Sep. 01, 2018 | Jul. 01, 2017
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Brand Group Holdings, Inc. |  |
Business Acquisition [Line Items] |  |
Cash and cash equivalents | $ 193,436 |
Securities | 71,246 |
Loans, including mortgage loans held for sale | 1,589,254 |
Premises and equipment | 20,070 |
Intangible assets | 349,416 |
Other assets | 112,050 |
Total assets | 2,335,472 |
Deposits | 1,714,177 |
Borrowings | 90,912 |
Other liabilities | 55,930 |
Total liabilities | 1,861,019 |
Metropolitan Bancgroup, Inc. |  |
Business Acquisition [Line Items] |  |
Cash and cash equivalents |  | $ 47,556
Securities |  | 108,697
Loans, including mortgage loans held for sale |  | 967,804
Premises and equipment |  | 8,576
Other real estate owned |  | 1,203
Intangible assets |  | 147,478
Other assets |  | 69,567
Total assets |  | 1,350,881
Deposits |  | 942,084
Borrowings |  | 174,522
Other liabilities |  | 20,685
Total liabilities |  | $ 1,137,291
Brand Mortgage Group, LLC |  |
Business Acquisition [Line Items] |  |
Borrowings | 34,139 |
Loans held for sale | $ 48,100 |

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